Can someone explain to me why this photo is rejected?

There may be multiple reasons for refusal.  But Stock Examiners are not allowed to check more than one box per submission. So the review stops at problem #1.

https://helpx.adobe.com/stock/contributor/help/reasons-for-content-rejection.html

Keep that in mind if you decide to re-submit under a new file name later. Get all your ducks in a row first.

See Property Guidelines:

https://helpx.adobe.com/stock/contributor/help/ip-guidelines.html

https://helpx.adobe.com/stock/contributor/help/property-release.html

Quality & Technical Issues

https://helpx.adobe.com/stock/contributor/help/quality-and-technical-issues.html

Hope that helps.